Solution : https://service.sap.com/sap/support/notes/1063059 (SAP Service marketplace login required)
Key words :
resource-related billing document reason, 00the i_item_with_rrdp import parameter, sd_downpayment_read function module, importsupport packages- sapkh47029, function module sd_downpayment_read, abap/4 function library, i_item_with_rrdp import parameter, billing plan, 'import' tab, i_item_with_rrdp parameter
Related Notes :
| 1033093 | DP90: Down payment clearing values in credit memos |